Home / 1,565.12-2,347.75-1,290.70

Finding the Fourth Proportional to 1,565.12, 2,347.75 and 1,290.70

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Solution

The fourth proportional to 1,565.12, 2,347.75 and 1,290.70 is: 1,936.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.12 : 2,347.75 = 1,290.70 : x
  2. Step 2: Convert to fraction form
    1,565.12/2,347.75 = 1,290.70/x
  3. Step 3: Cross multiply
    1,565.12x = 2,347.75 × 1,290.70
  4. Step 4: Simplify right side
    1,565.12x = 3,030,231.83
  5. Step 5: Solve for x
    x = 3,030,231.83/1,565.12
  6. Step 6: Final answer
    x = 1,936.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.